CVE-2025-57853
MediumCVSS 6.4Exploitation Probability (EPSS)
Low risk5th percentile - higher than 5% of all known CVEs
Summary
A container privilege escalation flaw was found in Web Terminal images. The /etc/passwd file was created with group-writable permissions during build. An attacker with command execution in the container (even as non-root) can leverage root group membership to modify /etc/passwd and add a user with arbitrary UID, including 0, gaining full root privileges.
Risk Assessment
Risk of full container compromise by an attacker, potentially leading to isolation breach and access to sensitive data.
Recommendation
Immediately update Web Terminal images to a version where /etc/passwd is not group-writable, or manually correct permissions.
Original NVD description (English source)
A container privilege escalation flaw was found in certain Web Terminal images. This issue stems from the /etc/passwd file being created with group-writable permissions during build time. In certain conditions, an attacker who can execute commands within an affected container, even as a non-root user, can leverage their membership in the root group to modify the /etc/passwd file. This could allow the attacker to add a new user with any arbitrary UID, including UID 0, leading to full root privileges within the container.